Process of making lead oxid.



No, 852,325. PATENTED APR. 30, 1907. G. A. HALL.

' PROCESS OF MAKING LEAD OXID.

APPLICATION FILED NOV. 17. 1905.

Making-Lead Oxid, of which the following is nnTTnn sTaTns PATENToTTToTJ.

CLARENCE A. HALL, OF PHILADELPHIA, PENNSYLVANIA.

PROGESS OF MAKING LEAD-OXID,

Specification of Letters Patent.

Patented April 30, 1907.

Application filed November 17, 1905. Serial No. 287,762.

a specification.

, he principal object of the present invention is to provide anefficient and reliable process for making or preparing lead oxid whichmay be of lighter specific gravity than that prepared by heat and whichmay be of a different structure which can be defined as amorphous asdistinguished from the crystalline structure of ordinary lead oxid orlitharge.

While the process may be practiced by means of a variety of apparatus, Ihave in the drawings illustrated partly in section one type of apparatusto which reference will be made.

Comminuted lead is used in the process and it can be obtained in theform of blown lead which is prepared according to well understoodmethods; The comminuted lead is wet with water and repeatedly showeredthrough a changing body of air under pressure. This causes the surfaceof the particles to oxidize. The showers of lead particles which havetheir surfaces to a great or less extent oxidized, plunge into a body ofwater and the effect of this is to detach the oxid and exposefresh-surfaces of the particles which are in their turn oxidized duringthe repetition of the described steps. The showering of the water wetparticles and their plunging into the body of water may be repeateduntil the required degree of oxidation is attained. The lead oxid isrecovered from the water. Instead of starting with particles of metalliclead, the same may have been oxidized to a greater or less extent.

In the drawings the chamber or vessel (1, contains a changing body ofair under pressure which is supplied by way of the pipe connections I)and c and may be heated. This chamber contains a body of water indicatedby the level (1, (1 e, is an elevator, conveyer or the like which causesthe comminuted lead to repeatedly fall as a shower through the body ofair and to be plunged into the body of water.

I do not intend to limit my invention fur- 1 'edly p un ing the showersof lead ther than the state of the art may require by any languageemployed in this speclfication or apparatuschosen for illustration, but

Having thus described the nature and objects of my invention, what Iclaim as new and'desire to secure by Letters Patent is:

1-. ,The process of preparing lead oxid which consists in causing a bodyof comminuted water Wet lead to repeatedly pass as a shower through achangin body of air under pressure to induce oxi ation, repeatedlyplunging the showers of lead particles into a body of water therebydetaching the oxid and exposing fresh surfaces of the lead particles forfurther oxidation, and repeating the foregoing steps until substantiallyall the lead is oxidized, substantially as described.

2. The process of preparing lead oxid which consists in causing a bodyof comminuted water wet lead to repeatedly pass as a shower through achanging body of hot air under ressure to induce oxidation,repeatarticles into a ho y of water thereby detac ing the oxid andexposing fresh surfaces of the lead particles for further oxidation, andrepeating the foregoing steps until substantially all the lead isoxidized, substantially as described.

3. The process of preparing lead oxid which consists in causing a bodyof water wet blown lead to repeatedly pass as a shower through achanging body of air under pressure to induce oxidation, repeatedlyplunging the showers of lead particles into a body of water therebydetaching the oxid and exposing fresh surfaces of the lead particles forfurther-oxidation, and re eating the foregoing steps until substantial yall the lead is oxidized, substantially as described.

4. The process of preparing lead oxid which consists in causing acomminuted water wet body containing lead to pass as a shower through achanging body of air under pressure to induce oxidation, plunging theshowers of particles into a body of water, and repeating the foregoingsteps until the desired degree of oxidation is attained, substantiallyas described.

In testimony whereof I have hereunto signed my name.

CLARENCE A. HALL.

Witnesses:

W. J. JACKSON, R. M. GILLIGAN.

